#include <iostream>
using namespace std;
class R
{
public:
    R(int r1, int r2)
    {
        R1 = r1;
        R2 = r2;
    }
    void print();
    void print() const;

private:
    int R1, R2;
};
void R::print()
{
    cout << R1 << ":" << R2 << endl;
}
void R::print() const
{
    cout << R1 << ";" << R2 << endl;
}
int main()
{
    R a(5, 4);
    a.print();
    const R b(20, 52);
    b.print();
}

/* 输出
5:4
20;52
*/